Question

Choose the correctly matched pair.

$Pair$	$Category$
Ferrous	Natural Gas
Non-Ferrous	Nickel
Non-Metallic Minerals	Limestone
Energy Minerals	Cobalt

Answer 1

Ferrous: Iron-bearing minerals, excluding natural gas.
Non-Ferrous: Metals like nickel, not relevant here.
Non-Metallic Minerals: Limestone is a valid example.
Energy Minerals: Examples include coal, petroleum, and uranium; cobalt is not included.